This paper describes vibro-acoustic direct and indirect measurements for road noise and vibration harshness (NVH) predictions from a complete car. Attention is devoted to the dynamic response of the structure and interior pressure field toward tire patch displacement inputs. The direct measurements exploited the Team Corporation CUBE high frequency 6 degree-of-freedom (DOF) shaker recently installed at the KULeuven Vehicle Technologies Laboratory; the input was provided directly at the tire contact patch, while the responses were measured as accelerations and pressures on the structure. In the indirect measurements a low-mid frequency volume velocity source (LMFVVS) was used to acoustically excite the structure in the reverse path direction from the inside of the interior car cavity, while accelerations on the car and forces/torques where acquired by a 6-DOF dynamometer at the tire patch. From both types of excitations Frequency Response Functions (FRF) were calculated in the frequency range [0-500 Hz]. The non-linearity of the full car system was investigated with different direct and indirect measurement tests, in order to assess the feasibility of the reciprocity principle in such a complex structure. Measurement set-ups, results and comparisons are described and discussed in detail.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Direct and indirect vibro-acoustic measurements for road noise NVH predictions


    Additional title:

    Direkte und indirekte Vibroakustische Messungen für Fahrbahn-NRV-Prädiktionen


    Contributors:


    Publication date :

    2005


    Size :

    9 Seiten, 21 Bilder, 2 Tabellen, 10 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    A novel mid-frequency formulation for vibro-acoustic predictions

    Baldanzini,N. / Citti,P. / Pierini,M. et al. | Automotive engineering | 2005


    GOCE satellite vibro-acoustic performance predictions using Alenia integrated F.E.M. & S.E.A. approach

    Ullio, R. / Marucchi-Chierro, P. C. / European Space Agency | British Library Conference Proceedings | 2005